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S Sutopo
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PENGARUH KERUSAKAN DAN KELERENGAN JALAN HUTAN TERHADAP PRODUKTIVITAS PENGANGKUTAN KAYU STUDI KASUS DI KALIMANTAN BARAT S Sutopo; Rahardjo S Suparto
Jurnal Penelitian Hasil Hutan Vol 5, No 7 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1988.5.7.420-424

Abstract

Timber transportation   productivity  decreases  when  forest  road  is  deteriorated   and  the  8lope  is large. This  study tried  to  investigate  the  effect  of  slope  and road  damage  on  timber  transportation  productivity,  and was carried out at the PT Sari Bumi  Kusuma  forest  company   areas in  West Kalimantan in  1987.The  investigation   results are as follows:Slope difference of  5% has significant   effect  on  transportation  productivity.  On  flat,   medium   and  steep  slopes, the productivities  are 265,   219 and  132  m3.  km/hr,   respectively.Transportation   productivity  is significantly influenced   by  a difference  of  15% damage  on  the  road. Productivities on  relatively   good  road, medium damaged  and  badly  damaged  roads  are  292,213  and  136 m3.km/hr, respectively.On flat  and  badly  damaged  roads  (at a damage  level greater  than  30%),   transportation  productivity  is reduced  64% which  caused  significant   financial  loss.  The  allowable  road damage  on  (at  terrain  without   causing financial  loss is 40%.On  medium   terrain  and  medium   damaged  roads  (at  damage  levels  between 15% and  30%), the  loss is significant. Medium damaged  (between 15%  and  30%) and heavy  damaged roads (greater than 30%) caused  transportation productivities  to  be decreased  as much as 25% and 58%,  respectively,   The allowable  road damage on medium   terrain without   causing financial  loss is 26%.On steep  terrain,   transportation   productivity is decreased  significantly i.e. 58% of  those on medium  damaged  roads (between   15% and  30%).  A  maximum   road damage  of  18%  is allowable  without  causing financial  loss.There  is  a significanf   interaction   between  slope  and road  damage.  The  steeper  the  slope  and  the  heavier  the  road damage,  the  larger  the  decrease in  transportation   productivity.In  the  transportation   distance of 60 km  and  the  timber  price  of  US$ 70/m3,  if timber  transportation  productivity decreases 30%,  it is strongly  suggested  to  repair damaged  road  immediatly   in order  to prevent   financial  losses.
STABILISASI TANAH LIAT DENGAN KAPUR PADA KONSTRUKSI BADAN JALAN HUTAN DI PULAU LAUT Rahardjo S Suparto; S Sutopo
Jurnal Penelitian Hasil Hutan Vol 1, No 2 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (18152.856 KB) | DOI: 10.20886/jphh.1984.1.2.11-22

Abstract

Subgrade  construction is an important part in forest  road building,  Subgrade soils with a high clay content  could  not be used satisfactorily as forest  road construction material  unless it is treated  to increase its stability.  The improvement of the  physical characteristics of clay  soils  related  to  subgrade  construction  can  be achieved  by  mixing  lime  of certain proportion into   the soil. The purpose of this investigation  is to determine the amount  of lime required for subgrade stabilization  which  have high clay content  in Pulau Laut,  South  Kalimantan The investigation  reveals the following :1.  The  efective  amount   of  lime  stabilization of  soils  is 7 percent of  the dry  weight  of  the  soil, resulting  in the following  physical  properties  :-  Bearing capacity  is 167 kg/cm2 at air dry  condition,-  Percent  of swell is 2.3,-  Plasticity index  is 25.5,  and-  pH is 9.00.2.  Stabilization   with  7 percent  lime is most  effective  for use in forest  road subgrade containing  about  66% clay. 
Lapisan Perkerasan Komposit Batu Pecah pada Kontruksi Jalan Hutan Rahardjo Rahardjo; S Suparto; S Sutopo
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4724.164 KB) | DOI: 10.20886/jphh.1987.4.2.50-55

Abstract

The use of pavement in Indonesian forest road construction at present is not common practice. Paving of logging roads is still considered too expensive, especially when its construction is not rational and effective. Information on pavement design especially with regard to its composition should help forest companies in solving their forest road construction problems.This investigation looks into the problem of finding the proper composition of crushed gravel and sand or rock dust for the construction of pavements. This kind of pavement is thought to have high shearing strength, stability and density.A series of laboratory test were conducted for this purpose, employing factorial analysis .A performance test in the field was conducted to compare with the Telford system using paired samples.The investigations revealed the following:- Crushed rock had significant influence on the shearing strength of the pavement. This material mixed with rock dust showed significant interaction.- Rock dust itself and water did not have significant effect on the shearing strength of pavement.- The use of water may help  facilitate the compaction process guiding the filler material into the voids among the crushed rock particles.- The proper composition turned out to be three units of crushed rock and two units of rock dust, resulting in a shearing strength of 0,226 kg/cm2.- Crushed rock composite made better pavement than the Telford system, resulting in lower settling of subgrade.- Based on the above, it is recommended to use a mixture of 2-3size crushed rock and rock dust in the proportion of 3 : 2 for pavement of forest roads, using smooth drum roller to obtain proper compaction.
PENGARUH KERUSAKAN DAN KELERENGAN JALAN HUTAN TERHADAP PRODUKTIVITAS PENGANGKUTAN KAYU STUDI KASUS DI KALIMANTAN BARAT S Sutopo; Rahardjo S Suparto
Jurnal Penelitian Hasil Hutan Vol 5, No 7 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3243.007 KB) | DOI: 10.20886/jphh.1988.5.7.420-424

Abstract

Timber transportation   productivity  decreases  when  forest  road  is  deteriorated   and  the  8lope  is large. This  study tried  to  investigate  the  effect  of  slope  and road  damage  on  timber  transportation  productivity,  and was carried out at the PT Sari Bumi  Kusuma  forest  company   areas in  West Kalimantan in  1987.The  investigation   results are as follows:Slope difference of  5% has significant   effect  on  transportation  productivity.  On  flat,   medium   and  steep  slopes, the productivities  are 265,   219 and  132  m3.  km/hr,   respectively.Transportation   productivity  is significantly influenced   by  a difference  of  15% damage  on  the  road. Productivities on  relatively   good  road, medium damaged  and  badly  damaged  roads  are  292,213  and  136 m3.km/hr, respectively.On flat  and  badly  damaged  roads  (at a damage  level greater  than  30%),   transportation  productivity  is reduced  64% which  caused  significant   financial  loss.  The  allowable  road damage  on  (at  terrain  without   causing financial  loss is 40%.On  medium   terrain  and  medium   damaged  roads  (at  damage  levels  between 15% and  30%), the  loss is significant. Medium damaged  (between 15%  and  30%) and heavy  damaged roads (greater than 30%) caused  transportation productivities  to  be decreased  as much as 25% and 58%,  respectively,   The allowable  road damage on medium   terrain without   causing financial  loss is 26%.On steep  terrain,   transportation   productivity is decreased  significantly i.e. 58% of  those on medium  damaged  roads (between   15% and  30%).  A  maximum   road damage  of  18%  is allowable  without  causing financial  loss.There  is  a significanf   interaction   between  slope  and road  damage.  The  steeper  the  slope  and  the  heavier  the  road damage,  the  larger  the  decrease in  transportation   productivity.In  the  transportation   distance of 60 km  and  the  timber  price  of  US$ 70/m3,  if timber  transportation  productivity decreases 30%,  it is strongly  suggested  to  repair damaged  road  immediatly   in order  to prevent   financial  losses.
STABILISASI TANAH LIAT DENGAN KAPUR PADA KONSTRUKSI BADAN JALAN HUTAN DI PULAU LAUT Rahardjo S Suparto; S Sutopo
Jurnal Penelitian Hasil Hutan Vol 1, No 2 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1984.1.2.11-22

Abstract

Subgrade  construction is an important part in forest  road building,  Subgrade soils with a high clay content  could  not be used satisfactorily as forest  road construction material  unless it is treated  to increase its stability.  The improvement of the  physical characteristics of clay  soils  related  to  subgrade  construction  can  be achieved  by  mixing  lime  of certain proportion into   the soil. The purpose of this investigation  is to determine the amount  of lime required for subgrade stabilization  which  have high clay content  in Pulau Laut,  South  Kalimantan The investigation  reveals the following :1.  The  efective  amount   of  lime  stabilization of  soils  is 7 percent of  the dry  weight  of  the  soil, resulting  in the following  physical  properties  :-  Bearing capacity  is 167 kg/cm2 at air dry  condition,-  Percent  of swell is 2.3,-  Plasticity index  is 25.5,  and-  pH is 9.00.2.  Stabilization   with  7 percent  lime is most  effective  for use in forest  road subgrade containing  about  66% clay. 
Lapisan Perkerasan Komposit Batu Pecah pada Kontruksi Jalan Hutan Rahardjo Rahardjo; S Suparto; S Sutopo
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1987.4.2.50-55

Abstract

The use of pavement in Indonesian forest road construction at present is not common practice. Paving of logging roads is still considered too expensive, especially when its construction is not rational and effective. Information on pavement design especially with regard to its composition should help forest companies in solving their forest road construction problems.This investigation looks into the problem of finding the proper composition of crushed gravel and sand or rock dust for the construction of pavements. This kind of pavement is thought to have high shearing strength, stability and density.A series of laboratory test were conducted for this purpose, employing factorial analysis .A performance test in the field was conducted to compare with the Telford system using paired samples.The investigations revealed the following:- Crushed rock had significant influence on the shearing strength of the pavement. This material mixed with rock dust showed significant interaction.- Rock dust itself and water did not have significant effect on the shearing strength of pavement.- The use of water may help  facilitate the compaction process guiding the filler material into the voids among the crushed rock particles.- The proper composition turned out to be three units of crushed rock and two units of rock dust, resulting in a shearing strength of 0,226 kg/cm2.- Crushed rock composite made better pavement than the Telford system, resulting in lower settling of subgrade.- Based on the above, it is recommended to use a mixture of 2-3size crushed rock and rock dust in the proportion of 3 : 2 for pavement of forest roads, using smooth drum roller to obtain proper compaction.
Co-Authors Rahardjo Rahardjo Rahardjo S Suparto S Suparto